package com.example.demo.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.demo.model.User;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

/**
 *
 */
@Mapper
public interface UserMapper extends BaseMapper<User> {

    @Select("select count(*) from t_user")
    int selectAllCount();


}
